Abstract
The response of composite fermions to large wave vector scattering has been studied through phonon drag measurements. While the response retains qualitative features of the electron system at zero magnetic field, notable discrepancies develop as the system is varied from a half-filled Landau level by changing density or field. These deviations, which appear to be inconsistent with the current picture of composite fermions, are absent if half filling is maintained while changing density. There remains, however, a clear deviation from the temperature dependence anticipated for scattering.
- Received 12 October 1998
DOI:https://doi.org/10.1103/PhysRevLett.85.1942
©2000 American Physical Society